ASTROSAT CZTI

Data Quality Report

Orbit 20201005_T03_245T01_9000003916_level2

Creation date: 2025-12-15T14:22:43.990874
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1T03_245T01_9000003916cztM0_level2.fits modeM0/AS1T03_245T01_9000003916cztM0_level2_quad_clean.evt
Size (bytes)1,265,918,400926,375,040
Size1.2 GB 883.5 MB
Events in quadrant A7,888,9045,045,610
Events in quadrant B7,577,5825,158,807
Events in quadrant C7,667,5304,918,721
Events in quadrant D6,499,4124,226,583

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02885970
B02848420
C02658690
D03794490

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025880
B025880
C025880
D025880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02220
B02220
C02220
D02220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12698830252.382115%
B12698823291.834032%
C12698820961.650550%
D12698887886.920339%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 148667 126989 0 0 0.00% 0.00%
B 148667 126984 0 0 0.00% 0.00%
C 148667 126987 0 0 0.00% 0.00%
D 148667 126550 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 6523 9.25 2058 1936 495.6
A 7 110 6282 8.77 2058 1936 495.6
A 9 19 5953 8.1 2058 1936 495.6
B 2 9 6041 10.74 2005 1919 383.7
B 2 8 4986 7.99 2005 1919 383.7
B 5 128 4964 7.94 2005 1919 383.7
C 12 241 5346 6.8 2025 1894 507.4
C 9 209 5262 6.64 2025 1894 507.4
C 9 233 5140 6.4 2025 1894 507.4
D 3 14 4797 6.32 1855 1688 492.2
D 10 189 4688 6.09 1855 1688 492.2
D 6 67 4488 5.69 1855 1688 492.2

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter